Abstract
Background
Genome-editing techniques incorporating artificial nucleases develop rapidly and enable efficient and precise modification of genomic DNA of numerous organisms. The present research aimed to establish a rapid, sensitive and visual method for genotyping of germline genome-edited mutants with small genomic fragment deletion.
Methods and Results
The genome-edited pigs with 2-bp deletion and 11-bp deletion of Myostatin (MSTN) gene generated by TALENs system were used as test materials to check the proposed allele-specific PCR (AS-PCR) and lateral flow nucleic acid biosensor (LFNAB) cascade method. AS-PCR can produce products with different tags to distinguish genome-edited alleles and wild-type alleles. A LFNAB was applied to do visual detection of AS-PCR products without using additional instruments. Furthermore, we demonstrated that AS-PCR and LFNAB cascade could accurately and visually distinguish genome-edited pigs with small genomic fragment deletion of Myostatin (MSTN) gene and wild-type pigs with limit of detection (LOD) of 0.1 ng.
Conclusion
The proposed AS-PCR and LFNAB cascade can do rapid and visual genotyping of genome-edited mutants with small genomic fragment deletion, serving as a platform for genome-edited animal genotyping.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (31802040 and 32172699).
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QS, XZ and BL conceived of the AS-PCR and LFNAB cascade method. QS performed the experiments. TW and KL contributed materials. QS and XZ wrote the manuscript. XZ, LB, WX, ZL, and PS edited the manuscript.
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Su, Q., Zhou, X., Wu, T. et al. Rapid visual genotyping method for germline mutants with small genomic fragment deletion by allele-specific PCR and lateral flow nucleic acid biosensor. Mol Biol Rep 48, 7325–7332 (2021). https://doi.org/10.1007/s11033-021-06734-x
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DOI: https://doi.org/10.1007/s11033-021-06734-x